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Production of spinning stoste with cellulose base fibre

A technology of cellulose fiber and spinning dope, applied in the direction of man-made filament made of viscose, can solve the problems of low solubility, low viscosity and difficult spinning process of cellulose, achieve full dissolution, save resources and Energy, environmental benefits and operator health effects

Inactive Publication Date: 2007-08-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the concentration of cellulose in the ionic liquid [BMIM]Cl is greater than 8%, the viscosity of the solution increases sharply and becomes gel-like, making it difficult to carry out spinning processing.
While the ionic liquid [BMIM]BF 4 Little solubility in cellulose, but low viscosity
Therefore, there are still many defects in the use of a single ionic liquid to dissolve and process cellulose.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Preparation of [BMIM]Cl and [BMIM]BF 4 The ionic liquid mixture with a molar ratio of 8:2 was used as a solvent. Cut wood pulp with a degree of polymerization of 400-1000 to an area less than 1cm with a pulp cutter 2 The small pieces are then put into a vacuum oven to dry so that the moisture content is less than 2%.

[0019] Mix 50 g of wood pulp flakes and 400 g of ionic liquid mixed liquid at a mass ratio of 1:8, stir well and raise the temperature to 80° C. in a vacuum oven, and vacuumize to prevent moisture absorption. After 3 hours, the wood pulp has been completely dissolved, and the spinning stock solution is prepared.

example 2

[0021] Preparation of [BMIM]Cl and [BMIM]BF 4 The ionic liquid mixture with a molar ratio of 9:1 was used as a solvent. Use a pulp cutter to cut the cotton pulp with a degree of polymerization of 300-900 into an area less than 1cm 2 The small pieces are then put into a vacuum oven to dry so that the moisture content is less than 2%.

[0022] Mix 50 g of wood pulp flakes and 350 g of ionic liquid mixture in a mass ratio of 1:7, stir well and heat up to 80° C. in a vacuum oven, and vacuumize to prevent moisture absorption. After 4 hours, the wood pulp has been completely dissolved, and the spinning stock solution is prepared.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention opened a preparing method of the cellulose fibre spinning stock solution. The solvent is the intermixture of the [BMIM]Cl and the [BMIM]BF4. The cellulose dissolves in the solvent after breaking up to get the uniform and transparent liquid. So it can save the energy, decrease the pollution and improve the quality of the stock solution.

Description

technical field [0001] The present invention relates to a kind of preparation method of cellulose fiber spinning dope, in particular to a kind of ionic liquid [BMIM]Cl and [BMIM]BF 4 The invention relates to a preparation method of a cellulose fiber spinning dope in which the mixed liquid is a solvent. Background technique [0002] Cellulose is a renewable resource that is ubiquitous in nature. Trees, cotton, rice stalks, corn and other plants and some bacterial secretions contain a lot of cellulose. Cellulose fibers may become a renewable resource to replace petroleum-based fibrous products. At present, the production of cellulose fiber mainly uses sodium hydroxide, acetone, carbon disulfide, etc. as solvents and additives, and the cellulose used needs to be yellowed, aged and matured, and it also involves formaldehyde, sulfite, sodium sulfide, sulfuric acid And chemical reagents such as zinc sulfate, all of the above-mentioned organic reagents are volatile, causing seri...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08
Inventor 王华平刘崴崴赵天瑜屠晓萍李达张玉梅郁铭芳
Owner DONGHUA UNIV
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